Release `25.3.x`

[kenodegard]

Summary

Placeholder for conda-build 25.3.x release.

Pilot	@kenodegard
Co-pilot	@ForgottenProgramme

Tasks

The week before release week

• Create release branch https://github.com/conda/conda-build/tree/25.3.x
• Ensure release candidates are being successfully built https://anaconda.org/conda-canary/repo/files?type=any&label=rc-conda-build-25.3.x
• Complete outstanding PRs
• Check for deprecated features
• Test release candidates 25.1.x...25.3.x
  • Tested on macOS by @kenodegard
  • Update RELEASE.md #5580
  • Add cdt_arch and cdt_name as used variables #5599
  • Fix transitive subpackage dependency resolution #5603
  • Bumping version of conda-sphinx-theme to 0.2.3 #5605
  • Bump time-based skip for tests/test_api_build.py::test_croot_with_spaces #5622
  • Warn if parsed and raw outputs mismatch #5601
  • Set patchelf<0.18 #5607
  • test: use flaky decorator for flaky OSX/Win tests #5623
  • Match build strings with globs #5600
  • Add an option to create arch specific, python version independent pkgs #5456
  • Bump time-based skip for tests/test_api_build.py::test_croot_with_spaces #5622
  • Fix run export substring check #5575
  • Use correct CONDA_EXE #5637
  • Fix lief  #5627
  • merge_tree: proper check for subdirectory #4977

Release week

• Create release PR (see release process) Changelog 25.3.0 #5642
• Create Zulip thread on #releases #releases > conda-build 25.3.x
  • Announce 25.3.0 in-progress #releases > conda-build 25.3.x @ 💬
• Publish release https://github.com/conda/conda-build/releases/tag/25.3.0
• Merge 25.3.x back into main #5643
• Activate the 25.3.x branch on ReadTheDocs
• Bump/update feedstocks
  • conda-build 25.3.0 AnacondaRecipes/conda-build-feedstock#55
  • conda-build v25.3.0 conda-forge/conda-build-feedstock#249
• Hand off to packaging team(s)
• Announce release
  • Create & publish conda.org blog post Add 2025 March releases post conda-dot-org#239
  • Post on Zulip thread #releases > conda-build 25.3.x @ 💬

Patch 25.3.1

• Revert "Fix transitive subpackage dependency resolution (#5603)" #5647
• Create release PR (see release process) Changelog 25.3.1 #5652
• Update Zulip thread on #releases
  • Announce 25.3.1 in-progress #releases > conda-build 25.3.x @ 💬
• Publish release https://github.com/conda/conda-build/releases/tag/25.3.1
• Merge 25.3.x back into main #5658
• Bump/update feedstocks
  • Anaconda, Inc.'s feedstock
  • conda-build v25.3.1 conda-forge/conda-build-feedstock#250
• Hand off to packaging team(s)
• Announce release
  • Post on Zulip thread #releases > conda-build 25.3.x @ 💬

Patch 25.3.2

• Regression: spurious InvalidVersionSpec on previously working constraint #5644
• Regression: grpc recipe not buildable with 25.3 anymore #5645
• Create release PR (see release process) Changelog 25.3.2 #5672
• Update Zulip thread on #releases
  • Announce 25.3.2 in-progress #releases > conda-build 25.3.x @ 💬
• Publish release https://github.com/conda/conda-build/releases/tag/25.3.2
• Merge 25.3.x back into main #5673
• Bump/update feedstocks
  • conda-build 25.3.2 AnacondaRecipes/conda-build-feedstock#56
  • conda-build v25.3.2 conda-forge/conda-build-feedstock#252
• Hand off to packaging team(s)
• Announce release
  • Post on Zulip thread #releases > conda-build 25.3.x @ 💬

[jakirkham]

(updated the conda-forge feedstock link)